IMSAI IMDOS The Standard of Excellence in IMSAI Multi-Disk Operating System Microcomputer Systems. Version 2.05 SYSTEM FEATURES Video/Context Editor Powerful Debugging Utility 8080/85 Assembler Disk and RAM Diagnostics Data Management Facilities Dynamic File Space Allocation Random or Sequential Access Scientific BASIC CP/M* Compatible IMOOS, the IMSAI Multi·Oisk Operating System, is a DATA MANAGEMENT FACILITIES powerful, user-oriented, multi-floppy disk based ope ra­ ting system compatible with CP/M. IMOOS can be used File Management functions include the. creation, re­ to simultaneously operate various I MSAI standard and naming, modification, transfer and deletion of files mini disk drives utilizing a number of formats, such as under user program control. Job Management provides various sector sizes, single and double density, and a user-extendable command language with provisions standard and double track . for "batching" together system operating commands for automatic processing. Storage Management routines IMOOS contains over twenty utilities, including a video/ in IMOOS control disk space allocation and re-alloca· context editor, assembler, dynamic debugging tool, tion. disk and memory testing program, as well as facilities for data management. Under IMOOS, the user may vary the system disk format and sector skewing for increased file access speed, and extend or decrease the ADDII\lG CUSTOMIZED DRIVERS number of directory entries. An error control option allows user selection of error handling. Volume names Adding customized drivers is important to the applica­ provide data security and diskette identification . tion programmer who wishes to mix peripherals. IM­ DOS includes the source for the I/O drivers. The user In addition to the IMOOS operating system, Scientific can edit BIOS (Basic Input/Output System) to contain BASIC is supplied. This high level language program has the new driver software and then incorporate the new all the usual disk-interactive BASIC features, including B lOS into the system using the MSO Relocating As­ real numbers, trigonometric functions and string hand­ sembler and Genesys. Genesys automatically takes care ling functions. Scientific BASIC also has these extra of any changed length of the I/O driver. The modified features: INPut and OUTput of data directly to I/O source code is assembled with the MSO Relocating ports, FREe available memory space, and special file Assembler, available as part of IMSAI's FORTRAN IV. I/O commands, FILE, PRINT, READ, CLOSE and IF END. IMOOS is compatible with all IMSAI floppy disk soft­ ware, including ANSI Level 2 FORTRAN IV, a linking loader and three other kinds of BASIC -- Microsoft, *CP/M is a trademark of Digital Research Corporation. Commercial and SK. IMOOS is compatible with CP/M Rev. 1.33. FILE ACCESS METHODS SAVE -- The SAVE command places a specified number of pages from the transient area of memory into a file Sequential and random access to records in files support with a name specified by th e user. the sophisticated file capabilities of high level languages. When initially formatting a disk, the user may relocate VER -- This command causes the system sign-on mes­ the directory on the diskette to increase fi Ie access sage to be displayed. This allows the user to check speed. Under IMDOS, the user may vary the length of the VERsion and memory size of the running system records within a file. Disk space is allocated in 1 K without reloading IMDOS into RAM. or 2K increments, and a file can be just 1 K or any length up to the storage capacity of the diskette. GO -- Runs whatever is in the transient program area. REN -- The REName command allows the user to re­ name files on disk. DISK ADDRESSING IMDOS is capable of addressing multiple disk interfaces on-line concurrently. Based upon the number and type of drives utilized, each drive is assigned a physical address from 1 through 95. Logical device names, IMDOS TRANSIENT PROGRAMS under program or operator control and represented by the letters A th rough W, may be assigned to any physical device. SYSMOV -- SYSMOV copies the IMDOS system image to another diskette. SYSTEM FEATURES STAT -- The STAT function performs several opera­ tions: The console command processor and system utilities, displays amount of storage on the oiskette. contained as individual program files on the IMDOS diskette, provide a complete repertoire of console displays storage bytes and number of records commands from which all program initialization, allocated to a fi Ie or files. operation, revision and storage is controlled. The com­ mand processor accepts two classes of commands, switches between single and double density resident and transient. format. Resident commands may be executed when IMDOS displays possible device assignments. has been loaded into RAM memory. These commands are evoked from the console keyboard and do not displays device name assignments (the logical appear in the file directory as do transient commands name assigned to each physical device). and programs. alters disk and device name assignments. Any file on the diskette with filetype extension ".COM" may be loaded by the console command processor into · the transient program area and executed. These transi­ ent programs may be either system utilities or user­ generated programs. DISKCOPY -- DISKCOPY allows an entire disk to be copied at one time without using PIP. DISKCOPY formats the new disk and verifies the correct transfer of IMDOS RESIDEI\IT COMMANDS disk files. DI R -- The D I Rectory command outputs the volume name of the diskette and all the fi les on the diskette, PIP -- The Peripheral Interchange Program, PIP, provides or all of the files of a particular generic grouping, onto a general purpose data transfer capability from file-to­ the current console device (CRT or TTY) as specified file, device-to-device, file-to-device and device-to-file. by the user. The PI P command statement permits the user to merge TYPE -- The TYPE command prints the contents of a many files into a single file, to transfer files from one specific program file on the current console device. disk to another, and to specify the copying of many files by generic groupings. PIP options include file ERA -- The ERAse command deletes the specified verification - reading and checking the destination file program file(s} and frees the space previously occupied following a copying operation - as well as character­ for new files. string testing for start/stop delimiters. , GENESYS -- The GENESYS utility performs several DIABLO -- DIABLO copies files to a HyType II 132­ important functions. The user can: column character printer. relocate the IMDOS system image fo r any particular memory size. LOAD -- LOAD reads the assembler object file "name. set up the number of file buffers. HEX" and creates the file "name.COM" containing the same program in binary mach ine-executable form. set up the length of buffers (128, 256 or 1024 bytes). SHAKDOWN -- SHAKDOWN is a diagnostic that select a cold boot command. This allows thoroughly tests the disk and memory. SHAKO OWN the user to set up a disk so that, when the helps you locate any hardware problems in the system or operator hits RESET, a specific message will verify that the system is operating properly. be displayed or a specific program will be executed. customize the memory partitioning under BASIC-E, RUN-E -- Included with IMDOS is BASIC-E, I MOOS to the user's own special needs by an extended disk BASIC compiler, and RUN-E, the choosing the amount of space to be taken by BASIC-E run time monitor. These programs respec­ buffers, the transient program area and free tively compile and execute programs written in Scienti­ space. fic BASIC. modify drivers to add customized 1/0.* FORMAT -- FORMAT initializes a diskette for use with the operating system to allow the hardware to locate tracks and sectors written on the diskette, creates an NED -- A very powerful component of IMSAI IMDOS empty directory of user-selectable size, and writes a is the NED Video/Context Editor. NED allows a com­ VOLUME CONTROL BLOCK (VCB) on the diskette. plete range of video cursor editing as well as editing The VCB contains the diskette's physical characteristics based on cha racter pointer position or contextual and fi Ie structure. The user can select where to place string-matching. the directory on the diskette to optimize seek times. Using video cursor editing with a CRT or video monitor, the control keys are defined in a special way for NED and allow powerful sub-editing commands as well as SUBMIT -- Using SUBMIT, IMDOS commands can be character, word and sentence insertion for creating batched together in a single file for automatic processing source programs or text. Video cursor editing will and executed as though they were entered individually work with any IMSAI VIO video interface-based system at the console. Thus, the user can maintain a procedure (i.e. VDP or PCS series) and some CRT terminals. library of specific command sequences using SUBMIT. In addition, a SUBMIT file can contain SUBMITs, Editing based on character pointer position or contexual allowing the chaining of SUBMIT commands. "Para­ string-matching enables single, mUltiple or global string­ meter substitution" permits IMDOS utilities to be substitution; character or string deletion by context batched together to automatically process a file through or count, etc. Editing operations may be entered as a a sequence of operations, such as NED, ASM and DDT. string of commands enabl ing a trained operator to speci­ fy complex operations, such as replacing paragraphs, changing letters and deleting sentences, all in one com­ mand. Macro-operations can be specified for repetitive LIST -- The LIST command copies a disk file, or all of operations.